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  • 1 ounce glucose
  • 1/2 teaspoon coarse salt
  • Pinch of citric acid
  • 1/2 bulb fennel, thinly sliced on a mandoline
  • Nonstick cooking spray


  1. Step 1

    Preheat oven to 180 degrees. Line a baking sheet with a nonstick baking mat; set aside.

  2. Step 2

    Place glucose, 6 tablespoons water, salt, and citric acid in a small saucepan and bring to a simmer over medium heat. Remove from heat and let cool.

  3. Step 3

    Place fennel in an even layer in a vacuum bag; add glucose solution and seal on highest setting of a vaccum sealer. Let stand for at least 5 minutes. Remove fennel from bag and pat dry.

  4. Step 4

    Spray prepared baking sheet with nonstick cooking spray; wipe off any excess. Lay fennel slices in an even layer on baking sheet; top fennel with a second nonstick baking mat. Transfer to oven and bake for 10 minutes. Remove second nonstick baking mat and continue baking until fennel is dry and crisp, about 1 hour.

The Martha Stewart Show, April 2011

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